The correct answer is **5,770 km ^{2}**.

Use the formula (area) = (power)/(flux): the answer is 4.44x10^{5} MW divided by 77 MW/km^{2}.

This is about the area of the state of Delaware.

**Question 10.**

Now find the collecting area needed to replace all power consumption in the United States. In 2003 total power consumption was 3.29x10^{6} MW.

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© 2001-2002, 2005 by Wm. Robert Johnston.

Last modified 11 January 2005.

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